Thompson.— A Rare Thalassinid. 
PLATE 1. 
(All figures are from camera lucida drawings by the author unless otherwise 
noted.) 
Fig. 1. Adult Naushonia, female specimen; right side. X 4.5. pr 2 , second 
pereiopod ; t, telson ; abd 2 , second abdominal segment; si, longitudi¬ 
nal groove ; a 1? antennula; a 2 , antenna. 
Fig. 2. Head of male specimen ; left side. X 70 (?). sor, supra-orbital keel; 
ex, scaphocerite of antenna. 
Fig. 3. Tail-fan. X 6. 
Fig. 4. Head of male specimen; dorsal side. X 23. ex, scaphocerite ; sor, 
supra-orbital ridge; sc, cervical groove ; si, longitudinal groove. 
Fig. 5. Third maxilliped ; basal portion, inner face, x 20. 
Fig. 6. Mandible; inner face. X 16 (?). 
Fig. 7. First maxilla; ventral side. X 16 (?). li, lacinia interna ; p', palpus. 
Fig. 8. Second maxilla ; ventral side, sc, scaphognatliite ; en, endopod; le, 
lacinia externa ; li, lacinia interna. 
Fig. 9. Second maxilliped; ventral side. X 27. mb, mastigobranch ; pb, 
podobrancli; en, endopod. 
Fig. 10. First maxilliped; mastigobranch removed. X 12.5. en, endopod. 
Fig. 11. Second pereiopod; distal portion. 
Fig. 12. First maxilliped ; adolescent, ventral side. X 23.5. en, endopod ; 
ex, exopod. 
Fig. 13. Apex of endopod, second maxilliped ; adolescent. 
Fig. 14. Mastigo- and podobranch of third maxilliped; adult. 
Fig. 15. Mastigo- and podobranch of second pereiopod of adult, cb, calcified 
bar. 
Fig. 16. Mastigobranch of fourth pereiopod of adult, ab, arthrobranchs of 
same segment. 
Fig. 17. Chela of more advanced adolescent stage. 
Fig. 18. Tail-fan; adolescent. X 6. 
Fig. 19. Second pleopod ; adult, anterior surface. X 12. ir, inner ramus. 
